Genetic analysis strongly suggests that early humans first arose in Africa and emerged out of Africa only ~100,000 years ago, a fairly recent development, evolutionarily speaking, which explains why we are all closely related. Any classification of biological races within our species is arbitrary because there are no major discontinuities in our diversity across the globe. Importantly, genetic data show that currently populous groups are not necessarily reflected by their past abundance, and human history is one of repeated admixture, not maintenance of purity. It is this genetic admixture that has left an imprint on every human disease with a genetic component, including common chronic ones. Thus, it is quite unlikely that the genetic variations underlying our diseases, which represent only a small fraction of our genetic diversity, will vary markedly across humanity.

Six decades before Rosa Parks boarded her fateful bus, another traveler in the Deep South tried to strike a blow against racial discrimination—but ultimately fell short of that goal, leading to the Supreme Court’s landmark 1896 decision in Plessy v. Ferguson. Now Williamjames Hull Hoffer vividly details the origins, litigation, opinions, and aftermath of this notorious case.

In response to the passage of the Louisiana Separate Car Act of 1890, which prescribed “equal but separate accommodations” on public transportation, a group called the Committee of Citizens decided to challenge its constitutionality. At a pre-selected time and place, Homer Plessy, on behalf of the committee, boarded a train car set aside for whites, announced his non-white racial identity, and was immediately arrested. The legal deliberations that followed eventually led to the Court’s 7-1 decision in Plessy, which upheld both the Louisiana statute and the state’s police powers. It also helped create a Jim Crow system that would last deep into the twentieth century, until Brown v. Board of Education in 1954 and other cases helped overturn it.

Hoffer’s readable study synthesizes past work on this landmark case, while also shedding new light on its proceedings and often-neglected historical contexts. From the streets of New Orleans’ Faubourg Tremé district to the justices’ chambers at the Supreme Court, he breathes new life into the opposing forces, dissecting their arguments to clarify one of the most important, controversial, and socially revealing cases in American law. He particularly focuses on Justice Henry Billings Brown’s ruling that the statute’s “equal, but separate” condition was a sufficient constitutional standard for equality, and on Justice John Marshall Harlan’s classic dissent, in which he stated, “Our Constitution is color-blind, and neither knows nor tolerates classes among its citizens.”

Hoffer’s compelling reconstruction illuminates the controversies and impact of Plessy v. Ferguson for a new generation of students and other interested readers. It also pays tribute to a group of little known heroes from the Deep South who failed to hold back the tide of racial segregation but nevertheless laid the groundwork for a less divided America.